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(Xojo Plugin) XML-DSig Add Object Reference with Transforms Specified Explicitly

Demonstrates how to use the new AddObjectRef2 method to explicitly specify the XML Transforms fragment.

Chilkat Xojo Plugin Download

Xojo Plugin for Windows, Linux, Mac OS X, and ARM, ARM64

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

Dim success As Boolean
success = True

// Build the following XML to be signed:

// <?xml version="1.0" encoding="utf-8"?>
// <InitUpload xmlns="http://e-dokumenty.mf.gov.pl">
//     <DocumentType>JPK</DocumentType>
//     <Version>01.02.01.20160617</Version>
//     <EncryptionKey algorithm="RSA" encoding="Base64" mode="ECB" padding="PKCS#1">xxxx</EncryptionKey>
//     <DocumentList>
//         <Document>
//             <FormCode schemaVersion="1-1" systemCode="JPK_VAT (3)">JPK_VAT</FormCode>
//             <FileName>JPK_VAT_3_v1-1_20181201.xml</FileName>
//             <ContentLength>8736</ContentLength>
//             <HashValue algorithm="SHA-256" encoding="Base64">JEDI1pItwh6dj/Xx1uts/x61qnjZ4DLHpkZMhmf1oKQ=</HashValue>
//             <FileSignatureList filesNumber="1">
//                 <Packaging>
//                     <SplitZip mode="zip" type="split"/>
//                 </Packaging>
//                 <Encryption>
//                     <AES block="16" mode="CBC" padding="PKCS#7" size="256">
//                         <IV bytes="16" encoding="Base64">z64oN9zXHt1+S3XACRSCYw==</IV>
//                     </AES>
//                 </Encryption>
//                 <FileSignature>
//                     <OrdinalNumber>1</OrdinalNumber>
//                     <FileName>JPK_VAT_3_v1-1_20181201-000.xml.zip.aes</FileName>
//                     <ContentLength>16</ContentLength>
//                     <HashValue algorithm="MD5" encoding="Base64">5MX0q1935fvMjLFV7E1yDw==</HashValue>
//                 </FileSignature>
//             </FileSignatureList>
//         </Document>
//     </DocumentList>
// </InitUpload>

// Use this online tool to generate code from sample XML: 
// Generate Code to Create XML

Dim xmlToSign As New Chilkat.Xml
xmlToSign.Tag = "InitUpload"
success = xmlToSign.AddAttribute("xmlns","http://e-dokumenty.mf.gov.pl")
xmlToSign.UpdateChildContent "DocumentType","JPK"
xmlToSign.UpdateChildContent "Version","01.02.01.20160617"
success = xmlToSign.UpdateAttrAt("EncryptionKey",True,"algorithm","RSA")
success = xmlToSign.UpdateAttrAt("EncryptionKey",True,"encoding","Base64")
success = xmlToSign.UpdateAttrAt("EncryptionKey",True,"mode","ECB")
success = xmlToSign.UpdateAttrAt("EncryptionKey",True,"padding","PKCS#1")
xmlToSign.UpdateChildContent "EncryptionKey","xxxx"
success = xmlToSign.UpdateAttrAt("DocumentList|Document|FormCode",True,"schemaVersion","1-1")
success = xmlToSign.UpdateAttrAt("DocumentList|Document|FormCode",True,"systemCode","JPK_VAT (3)")
xmlToSign.UpdateChildContent "DocumentList|Document|FormCode","JPK_VAT"
xmlToSign.UpdateChildContent "DocumentList|Document|FileName","JPK_VAT_3_v1-1_20181201.xml"
xmlToSign.UpdateChildContent "DocumentList|Document|ContentLength","8736"
success = xmlToSign.UpdateAttrAt("DocumentList|Document|HashValue",True,"algorithm","SHA-256")
success = xmlToSign.UpdateAttrAt("DocumentList|Document|HashValue",True,"encoding","Base64")
xmlToSign.UpdateChildContent "DocumentList|Document|HashValue","JEDI1pItwh6dj/Xx1uts/x61qnjZ4DLHpkZMhmf1oKQ="
success = xmlToSign.UpdateAttrAt("DocumentList|Document|FileSignatureList",True,"filesNumber","1")
success = xmlToSign.UpdateAttrAt("DocumentList|Document|FileSignatureList|Packaging|SplitZip",True,"mode","zip")
success = xmlToSign.UpdateAttrAt("DocumentList|Document|FileSignatureList|Packaging|SplitZip",True,"type","split")
success = xmlToSign.UpdateAttrAt("DocumentList|Document|FileSignatureList|Encryption|AES",True,"block","16")
success = xmlToSign.UpdateAttrAt("DocumentList|Document|FileSignatureList|Encryption|AES",True,"mode","CBC")
success = xmlToSign.UpdateAttrAt("DocumentList|Document|FileSignatureList|Encryption|AES",True,"padding","PKCS#7")
success = xmlToSign.UpdateAttrAt("DocumentList|Document|FileSignatureList|Encryption|AES",True,"size","256")
success = xmlToSign.UpdateAttrAt("DocumentList|Document|FileSignatureList|Encryption|AES|IV",True,"bytes","16")
success = xmlToSign.UpdateAttrAt("DocumentList|Document|FileSignatureList|Encryption|AES|IV",True,"encoding","Base64")
xmlToSign.UpdateChildContent "DocumentList|Document|FileSignatureList|Encryption|AES|IV","z64oN9zXHt1+S3XACRSCYw=="
xmlToSign.UpdateChildContent "DocumentList|Document|FileSignatureList|FileSignature|OrdinalNumber","1"
xmlToSign.UpdateChildContent "DocumentList|Document|FileSignatureList|FileSignature|FileName","JPK_VAT_3_v1-1_20181201-000.xml.zip.aes"
xmlToSign.UpdateChildContent "DocumentList|Document|FileSignatureList|FileSignature|ContentLength","16"
success = xmlToSign.UpdateAttrAt("DocumentList|Document|FileSignatureList|FileSignature|HashValue",True,"algorithm","MD5")
success = xmlToSign.UpdateAttrAt("DocumentList|Document|FileSignatureList|FileSignature|HashValue",True,"encoding","Base64")
xmlToSign.UpdateChildContent "DocumentList|Document|FileSignatureList|FileSignature|HashValue","5MX0q1935fvMjLFV7E1yDw=="

Dim gen As New Chilkat.XmlDSigGen

gen.SigLocation = "InitUpload"
gen.SigLocationMod = 0
gen.SigId = "id-1234"
gen.SigNamespacePrefix = "ds"
gen.SigNamespaceUri = "http://www.w3.org/2000/09/xmldsig#"
gen.SignedInfoCanonAlg = "EXCL_C14N"
gen.SignedInfoDigestMethod = "sha256"

// Create an Object to be added to the Signature.

// <xades:QualifyingProperties Target="#id-1234" xmlns:xades="http://uri.etsi.org/01903/v1.3.2#">
//     <xades:SignedProperties Id="xades-id-1234">
//         <xades:SignedSignatureProperties>
//             <xades:SigningTime>TO BE GENERATED BY CHILKAT</xades:SigningTime>
//             <xades:SigningCertificate>
//                 <xades:Cert>
//                     <xades:CertDigest>
//                         <ds:DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/>
//                         <ds:DigestValue>TO BE GENERATED BY CHILKAT</ds:DigestValue>
//                     </xades:CertDigest>
//                     <xades:IssuerSerial>
//                         <ds:X509IssuerName>TO BE GENERATED BY CHILKAT</ds:X509IssuerName>
//                         <ds:X509SerialNumber>TO BE GENERATED BY CHILKAT</ds:X509SerialNumber>
//                     </xades:IssuerSerial>
//                 </xades:Cert>
//             </xades:SigningCertificate>
//         </xades:SignedSignatureProperties>
//         <xades:SignedDataObjectProperties>
//             <xades:DataObjectFormat ObjectReference="#r-id-1">
//                 <xades:MimeType>text/xml</xades:MimeType>
//             </xades:DataObjectFormat>
//         </xades:SignedDataObjectProperties>
//     </xades:SignedProperties>
// </xades:QualifyingProperties>

Dim object1 As New Chilkat.Xml
object1.Tag = "xades:QualifyingProperties"
success = object1.AddAttribute("Target","#id-1234")
success = object1.AddAttribute("xmlns:xades","http://uri.etsi.org/01903/v1.3.2#")
success = object1.UpdateAttrAt("xades:SignedProperties",True,"Id","xades-id-1234")
// Note: It may be that http://www.w3.org/2001/04/xmlenc#sha256 is needed in the following line instead of http://www.w3.org/2000/09/xmldsig#sha1
object1.UpdateChildContent "xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningTime","TO BE GENERATED BY CHILKAT"
success = object1.UpdateAttrAt("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert|xades:CertDigest|ds:DigestMethod",True,"Algorithm","http://www.w3.org/2000/09/xmldsig#sha1")
object1.UpdateChildContent "xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert|xades:CertDigest|ds:DigestValue","TO BE GENERATED BY CHILKAT"
object1.UpdateChildContent "xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert|xades:IssuerSerial|ds:X509IssuerName","TO BE GENERATED BY CHILKAT"
object1.UpdateChildContent "xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert|xades:IssuerSerial|ds:X509SerialNumber","TO BE GENERATED BY CHILKAT"
success = object1.UpdateAttrAt("xades:SignedProperties|xades:SignedDataObjectProperties|xades:DataObjectFormat",True,"ObjectReference","#r-id-1")
object1.UpdateChildContent "xades:SignedProperties|xades:SignedDataObjectProperties|xades:DataObjectFormat|xades:MimeType","text/xml"

success = gen.AddObject("",object1.GetXml(),"","")

// -------- Reference 1 --------
// Build the following Transforms fragment:

// <ds:Transforms>
//     <ds:Transform Algorithm="http://www.w3.org/TR/1999/REC-xpath-19991116">
//         <ds:XPath>not(ancestor-or-self::ds:Signature)</ds:XPath>
//     </ds:Transform>
//     <ds:Transform Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/>
// </ds:Transforms>

Dim xml1 As New Chilkat.Xml
xml1.Tag = "ds:Transforms"
success = xml1.UpdateAttrAt("ds:Transform",True,"Algorithm","http://www.w3.org/TR/1999/REC-xpath-19991116")
xml1.UpdateChildContent "ds:Transform|ds:XPath","not(ancestor-or-self::ds:Signature)"
success = xml1.UpdateAttrAt("ds:Transform[1]",True,"Algorithm","http://www.w3.org/2001/10/xml-exc-c14n#")

success = gen.AddSameDocRef2("","sha256",xml1,"")
success = gen.SetRefIdAttr("","r-id-1")

// -------- Reference 2 --------
// Build the following Transforms fragment:

// <ds:Transforms>
//     <ds:Transform Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/>
// </ds:Transforms>

Dim xml2 As New Chilkat.Xml
xml2.Tag = "ds:Transforms"
success = xml2.UpdateAttrAt("ds:Transform",True,"Algorithm","http://www.w3.org/2001/10/xml-exc-c14n#")

success = gen.AddObjectRef2("xades-id-1234","sha256",xml2,"http://uri.etsi.org/01903#SignedProperties")

// Provide a certificate + private key. (PFX password is test123)
Dim cert As New Chilkat.Cert
success = cert.LoadPfxFile("qa_data/pfx/cert_test123.pfx","test123")
If (success <> True) Then
    System.DebugLog(cert.LastErrorText)
    Return
End If

success = gen.SetX509Cert(cert,True)

gen.KeyInfoType = "X509Data"
gen.X509Type = "Certificate"

// Load XML to be signed...
Dim sbXml As New Chilkat.StringBuilder
success = xmlToSign.GetXmlSb(sbXml)

gen.Behaviors = "IndentedSignature"

// Sign the XML...
success = gen.CreateXmlDSigSb(sbXml)
If (success <> True) Then
    System.DebugLog(gen.LastErrorText)
    Return
End If

// -----------------------------------------------

// Save the signed XML to a file.
success = sbXml.WriteFile("qa_output/signedXml.xml","utf-8",False)

System.DebugLog(sbXml.GetAsString())

// ----------------------------------------
// Verify the signatures we just produced...
Dim verifier As New Chilkat.XmlDSig
success = verifier.LoadSignatureSb(sbXml)
If (success <> True) Then
    System.DebugLog(verifier.LastErrorText)
    Return
End If

Dim numSigs As Int32
numSigs = verifier.NumSignatures
Dim verifyIdx As Int32
verifyIdx = 0
While verifyIdx < numSigs
    verifier.Selector = verifyIdx
    Dim verified As Boolean
    verified = verifier.VerifySignature(True)
    If (verified <> True) Then
        System.DebugLog(verifier.LastErrorText)
        Return
    End If

    verifyIdx = verifyIdx + 1
Wend
System.DebugLog("All signatures were successfully verified.")
 

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